Yagoona Water Hardness & Quality Report (2026)
Water Hardness
Source
reservoir
pH Level
8
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
379.4 mg/L
Est. Daily Cost
A$0.53
energy & soap waste
Source: BOM National Performance Report & ADWG · Updated 2026
0–60
mg/L
Soft
61–120
mg/L
Moderately Hard
121–180
mg/L
Hard
180+
mg/L
Very Hard
Appliance Damage Report
In Yagoona, your appliances are currently losing 22% efficiency due to mineral buildup.
| Appliance | In Yagoona | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.1 yrs | 8.5 yrs | -52% |
| Washing Machine | 7.4 yrs | 12 yrs | -38% |
| Water Heater | 8.9 yrs | 15 yrs | -41% |
Regional Water Comparison
How Yagoona compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Yagoona, New South Wales | 168 mg/L | 🟠 Hard | reservoir |
| Bankstown, New South Wales | 185 mg/L | 🔴 Very Hard | reservoir |
| Condell Park, New South Wales | 166 mg/L | 🟠 Hard | reservoir |
| Chester Hill, New South Wales | 148 mg/L | 🟠 Hard | reservoir |
| Greenacre, New South Wales | 154.5 mg/L | 🟠 Hard | reservoir |
National Benchmark
How Yagoona compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Yagoona | 168 mg/L | 🟠 Moderate |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes Yagoona's Water Unique?
Local geology and source profile
Yagoona's drinking water is supplied by Sydney Water, treated at the Prospect Water Filtration Plant blending Warragamba Dam with a significant Hawkesbury-Nepean component for the Canterbury-Bankstown LGA inner south-western Sydney distribution in New South Wales. Water hardness in Yagoona is measured at 168 mg/L — classified as moderately hard, approaching the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Yagoona — an inner south-western Sydney suburb of post-war residential estates and the Auburn-Bankstown commercial corridor — carries one of the harder supplies in the inner Sydney network, substantially harder than the soft Warragamba-dominant supply of adjacent Fairfield (28 mg/L) in the neighbouring LGA across the Prospect distribution zone boundary.
Yagoona's elevated hardness reflects a proportionally significant Hawkesbury-Nepean component in the Canterbury-Bankstown inner south-west Prospect distribution blend. The Hawkesbury-Nepean system traverses the Cumberland Plain alluvial deposits and Triassic carbonate-cemented sedimentary formations — dissolving substantial calcium bicarbonate before Prospect treatment. The Yagoona Canterbury-Bankstown distribution sub-zone receives a notably elevated Hawkesbury-Nepean fraction compared to the Warragamba-dominant south-western LGAs, raising hardness to 168 mg/L and TDS to 379.4 mg/L in this inner south-west corridor.
Yagoona residents face moderate to heavy limescale build-up on taps, shower screens, and in kettles — descaling every two to three weeks is typical. Hot water systems benefit from annual inspection. The elevated lead reading (0.004 mg/L) warrants always briefly running the cold tap before use in Yagoona's older established residential areas. Sydney Water provides water quality information at sydneywater.com.au, with all ADWG health standards consistently met. A point-of-use filter or water softener is a practical investment for this inner south-western Sydney community.
Geology & Source: Supplied by Sydney Water via the Prospect Water Filtration Plant blending Warragamba Dam with a significant Hawkesbury-Nepean component — the Yagoona Canterbury-Bankstown inner south-west supply carries moderately hard water at 168 mg/L with elevated TDS of 379.4 mg/L, among the harder inner Sydney sub-zones, reflecting the elevated Hawkesbury-Nepean proportion at the Bankstown distribution corridor.